Retaining wall block with side openings



FIG. 1 is a bottom perspective view of a retaining wall block with side openings showing my new design;

FIG. 2 is a bottom plan view thereof; and,

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image of FIG. 3.

The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design of a retaining wall block with side openings, as shown and described. 